Dimension wildcard for <Line>

In

<ComponentType name="Line">
        <Parameter name="scale" dimension="*"/>
         <Parameter name="timeScale" dimension="*"/>
        <Path name="quantity"/>
        <Text name="color"/>
        <Simulation>
            <Record quantity="quantity" timeScale="timeScale" scale="scale" color="color"/>
        </Simulation>
    </ComponentType>

we should say that scale takes the dimension of <Path name='quantity'>, whereas timescale should point to the "magic" universal time (magic in the sense that it has "special" behaviour in e.g. TimeDerivatives).

Ideally, we should be able to use any other variable in the "x-axis", so the same reasoning as above applies. And I guess that the scaling factors should be made adimensional, and all dimensinality delegated to the timeseries being plotted.

No files, tests, or code entry points are named. Start by locating the handling of ComponentType, Parameter dimensions, Path quantities, and the special universal time behavior in the interpreter. Before implementation, clarify wildcard semantics, arbitrary x-axis variables, and scaling dimensionality; done should include agreed behavior and corresponding tests.